Means of escape from outdoor venues.

I noticed one of the reasons people had trouble leaving the disaster area was the lack of ways to evacuate , there were walls and evidently the only way to exit was the entry into the event. is there a code to address this situation and if not it is my opinion one needs to be developed with the lives of those attending the event and not the money making for the organizers. I feel very strongly that at least one means of escape child be provided on at least three side of the gathering area and no more than 100' between these means of escape.